Al:
The only possible cause would be that the link between the speedo cable and
the transmission was being affected by the vibration. That would indicate
some sort of magnetic follower gear in the transmission which seems
amazingly unlikely for a mechanical speedo. What sort of speedometer setup
do you have in the conversion?
Mark Hooper
1972 TR6
-----Original Message-----
From: Paula J. Graffam [mailto:pjgraffam@juno.com]
Sent: Monday, March 24, 2003 5:28 PM
To: 6pack@autox.team.net
Subject: Prop/driveshaft vibration
Hi Listers,
After converting my tranny(van den Akker) I noticed a definate vibration
at 60mph@ 3000+ rpm. Some call it harmonic vibration. After talking to
Herman, he advised me to rotate the driveshaft 180degrees ( maybe I
incorrectly installed the shaft).
Well it worked . . . much to my relief!!! I guess it's a common
troubleshooting technique. However, I also noticed that my rpms
DECREASED especially in 4th and 5th gears. I'm not sure why this is.
Mind you now, I'm NOT complaining.
I'm now doing about 26k at 60mph and just about 29k at 70mph.
Does anyone know why I'm doing better on the rpms AFTER the correction?
Regards,
Al Graffam
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